If you have an equation such as
x-y = v+w
this is the same as
v+w = x-y
Whatever operation you perform on one side of the equals, you must perform on the other side.
for example,
v+w+2 = x-y+2
also, you can simplify expressions using brackets
2(a+2) = 2a+4
This equation works for every value of a.
If you have an equation such as
x-y = v+w
this is the same as
v+w = x-y
Whatever operation you perform on one side of the equals, you must perform on the other side.
for example,
v+w+2 = x-y+2
also, you can simplify expressions using brackets
2(a+2) = 2a+4
This equation works for every value of a.
This is the foundation for constructing and solving equations.